================================ WARNING: inconsistent lock state 5.5.0-rc6-next-20200116-syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. kworker/0:3/2727 [HC0[0]:SC1[1]:HE1:SE0] takes: ffffffff8a03ce58 (ima_keys_lock){+.?.}, at: spin_lock include/linux/spinlock.h:338 [inline] ffffffff8a03ce58 (ima_keys_lock){+.?.}, at: ima_process_queued_keys+0x4f/0x320 security/integrity/ima/ima_asymmetric_keys.c:144 {SOFTIRQ-ON-W} state was registered at: lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4484 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] ima_queue_key security/integrity/ima/ima_asymmetric_keys.c:111 [inline] ima_post_key_create_or_update+0x234/0x470 security/integrity/ima/ima_asymmetric_keys.c:194 key_create_or_update+0x6b8/0xcb0 security/keys/key.c:944 load_system_certificate_list+0x1ba/0x25e certs/system_keyring.c:161 do_one_initcall+0x120/0x820 init/main.c:1109 do_initcall_level init/main.c:1182 [inline] do_initcalls init/main.c:1198 [inline] do_basic_setup init/main.c:1218 [inline] kernel_init_freeable+0x522/0x5d0 init/main.c:1402 kernel_init+0x12/0x1bf init/main.c:1309 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 irq event stamp: 5519986 hardirqs last enabled at (5519986): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (5519986): [] _raw_spin_unlock_irq+0x23/0x80 kernel/locking/spinlock.c:199 hardirqs last disabled at (5519985): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline] hardirqs last disabled at (5519985): [] _raw_spin_lock_irq+0x3a/0x80 kernel/locking/spinlock.c:167 softirqs last enabled at (5517754): [] srcu_invoke_callbacks+0x21c/0x360 kernel/rcu/srcutree.c:1186 softirqs last disabled at (5519929): [] invoke_softirq kernel/softirq.c:373 [inline] softirqs last disabled at (5519929): [] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(ima_keys_lock); lock(ima_keys_lock); *** DEADLOCK *** 3 locks held by kworker/0:3/2727: #0: ffff8880aa436928 ((wq_completion)rcu_gp){+.+.}, at: __write_once_size include/linux/compiler.h:250 [inline] #0: ffff8880aa436928 ((wq_completion)rcu_gp){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880aa436928 ((wq_completion)rcu_gp){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:869 [inline] #0: ffff8880aa436928 ((wq_completion)rcu_gp){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff8880aa436928 ((wq_completion)rcu_gp){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8880aa436928 ((wq_completion)rcu_gp){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8880aa436928 ((wq_completion)rcu_gp){+.+.}, at: process_one_work+0x8dd/0x17a0 kernel/workqueue.c:2235 #1: ffffc900082dfdc0 ((work_completion)(&(&ssp->work)->work)){+.+.}, at: process_one_work+0x917/0x17a0 kernel/workqueue.c:2239 #2: ffffc90000007d50 ((&ima_key_queue_timer)){+.-.}, at: lockdep_copy_map include/linux/lockdep.h:172 [inline] #2: ffffc90000007d50 ((&ima_key_queue_timer)){+.-.}, at: call_timer_fn+0xe0/0x780 kernel/time/timer.c:1394 stack backtrace: CPU: 0 PID: 2727 Comm: kworker/0:3 Not tainted 5.5.0-rc6-next-20200116-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: rcu_gp process_srcu Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 print_usage_bug.cold+0x327/0x378 kernel/locking/lockdep.c:3100 valid_state kernel/locking/lockdep.c:3111 [inline] mark_lock_irq kernel/locking/lockdep.c:3308 [inline] mark_lock+0xbb4/0x1220 kernel/locking/lockdep.c:3665 mark_usage kernel/locking/lockdep.c:3565 [inline] __lock_acquire+0x1e8e/0x4a00 kernel/locking/lockdep.c:3908 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4484 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] ima_process_queued_keys+0x4f/0x320 security/integrity/ima/ima_asymmetric_keys.c:144 ima_timer_handler+0x15/0x20 security/integrity/ima/ima_asymmetric_keys.c:46 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0x6c3/0x1790 kernel/time/timer.c:1786 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline] RIP: 0010:queue_delayed_work_on+0x12a/0x210 kernel/workqueue.c:1673 Code: 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 d8 00 00 00 48 83 3d fe 2c 66 08 00 0f 84 9a 00 00 00 e8 4b 0a 28 00 48 89 df 57 9d <0f> 1f 44 00 00 e8 3c 0a 28 00 44 89 f8 48 83 c4 10 5b 41 5c 41 5d RSP: 0018:ffffc900082dfbd0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8880a02ce5c0 RBX: 0000000000000293 RCX: 0000000000000006 RDX: 0000000000000000 RSI: ffffffff814d8d85 RDI: 0000000000000293 RBP: ffffc900082dfc08 R08: 1ffffffff16a51a9 R09: fffffbfff16a51aa R10: fffffbfff16a51a9 R11: ffffffff8b528d4f R12: 0000000000000200 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 queue_delayed_work include/linux/workqueue.h:509 [inline] srcu_reschedule kernel/rcu/srcutree.c:1226 [inline] srcu_reschedule+0xd7/0x130 kernel/rcu/srcutree.c:1209 process_srcu+0x125/0xe50 kernel/rcu/srcutree.c:1239 process_one_work+0xa05/0x17a0 kernel/workqueue.c:2264 worker_thread+0x98/0xe40 kernel/workqueue.c:2410 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352